drm/nouveau: ensure channels are stopped before saving fences for suspend

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 46c152ff0a80f41a102a332a2378867cf0e88f3a..383f4e6ea9d164c59509c7788666cf89fb6abbe0 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -453,18 +453,32 @@ nouveau_do_suspend(struct drm_device *dev)
        NV_INFO(drm, "evicting buffers...\n");
        ttm_bo_evict_mm(&drm->ttm.bdev, TTM_PL_VRAM);
 
+       NV_INFO(drm, "waiting for kernel channels to go idle...\n");
+       if (drm->cechan) {
+               ret = nouveau_channel_idle(drm->cechan);
+               if (ret)
+                       return ret;
+       }
+
+       if (drm->channel) {
+               ret = nouveau_channel_idle(drm->channel);
+               if (ret)
+                       return ret;
+       }
+
+       NV_INFO(drm, "suspending client object trees...\n");
        if (drm->fence && nouveau_fence(drm)->suspend) {
                if (!nouveau_fence(drm)->suspend(drm))
                        return -ENOMEM;
        }
 
-       NV_INFO(drm, "suspending client object trees...\n");
        list_for_each_entry(cli, &drm->clients, head) {
                ret = nouveau_client_fini(&cli->base, true);
                if (ret)
                        goto fail_client;
        }
 
+       NV_INFO(drm, "suspending kernel object tree...\n");
        ret = nouveau_client_fini(&drm->client.base, true);
        if (ret)
                goto fail_client;
@@ -514,17 +528,18 @@ nouveau_do_resume(struct drm_device *dev)
 
        nouveau_agp_reset(drm);
 
-       NV_INFO(drm, "resuming client object trees...\n");
+       NV_INFO(drm, "resuming kernel object tree...\n");
        nouveau_client_init(&drm->client.base);
        nouveau_agp_init(drm);
 
+       NV_INFO(drm, "resuming client object trees...\n");
+       if (drm->fence && nouveau_fence(drm)->resume)
+               nouveau_fence(drm)->resume(drm);
+
        list_for_each_entry(cli, &drm->clients, head) {
                nouveau_client_init(&cli->base);
        }
 
-       if (drm->fence && nouveau_fence(drm)->resume)
-               nouveau_fence(drm)->resume(drm);
-
        nouveau_run_vbios_init(dev);
        nouveau_pm_resume(dev);